Sello de valor (Sigil of Valor) (es)
Artifact - Equipment
(CMC 2)
Whenever equipped creature attacks alone, it gets +1/+1 until end of turn for each other creature you control.
Equip (: Attach to target creature you control. Equip only as a sorcery.)
- [BRR] The Brothers' War Retro Artifacts #116 (U)